package com.example.myrecyclerview.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * concise：****
 * 作者：王哲
 * Created by shootbox on 2016/1/27.
 */
    public class StreamTool {

        /**
         * 将流另存为文件
         *
         * @param is
         * @param outfile
         */
        public static void streamSaveAsFile(InputStream is, File outfile) {
            FileOutputStream fos = null;
            try {
                File file = outfile;
                fos = new FileOutputStream(file);
                byte[] buffer = new byte[1024];
                int len;
                while((len = is.read(buffer)) > 0){
                    fos.write(buffer, 0, len);
                }

            } catch (Exception e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            } finally {
                try {
                    is.close();
                    fos.close();
                } catch (Exception e2) {
                    e2.printStackTrace();
                    throw new RuntimeException(e2);
                }
            }
        }
        /**
         * Read an input stream into a string
         * @param in
         * @return
         * @throws IOException
         */
        static public String streamToString(InputStream in) throws IOException {
            StringBuffer out = new StringBuffer();
            byte[] b = new byte[4096];
            for (int n; (n = in.read(b)) != -1;) {
                out.append(new String(b, 0, n));
            }
            return out.toString();
        }
        public static byte[] stream2Byte(InputStream is) throws IOException {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            int len = 0;
            byte[] b = new byte[1024];
            while ((len = is.read(b, 0, b.length)) != -1) {
                baos.write(b, 0, len);
            }
            byte[] buffer =  baos.toByteArray();
            return buffer;
        }
        /**
         * @方法功能 InputStream 转为 byte
         * @param InputStream
         * @return 字节数组
         * @throws Exception
         */
        public static byte[] inputStream2Byte(InputStream inStream)
                throws Exception {
            // ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
            // byte[] buffer = new byte[1024];
            // int len = -1;
            // while ((len = inStream.read(buffer)) != -1) {
            // outSteam.write(buffer, 0, len);
            // }
            // outSteam.close();
            // inStream.close();
            // return outSteam.toByteArray();
            int count = 0;
            while (count == 0) {
                count = inStream.available();
            }
            byte[] b = new byte[count];
            inStream.read(b);
            return b;
        }

        /**
         * @方法功能 byte 转为 InputStream
         * @param 字节数组
         * @return InputStream
         * @throws Exception
         */
        public static InputStream byte2InputStream(byte[] b) throws Exception {
            InputStream is = new ByteArrayInputStream(b);
            return is;
        }

        /**
         * @功能 短整型与字节的转换
         * @param 短整型
         * @return 两位的字节数组
         */
        public static byte[] shortToByte(short number) {
            int temp = number;
            byte[] b = new byte[2];
            for (int i = 0; i < b.length; i++) {
                b[i] = new Integer(temp & 0xff).byteValue();// 将最低位保存在最低位
                temp = temp >> 8; // 向右移8位
            }
            return b;
        }

        /**
         * @功能 字节的转换与短整型
         * @param 两位的字节数组
         * @return 短整型
         */
        public static short byteToShort(byte[] b) {
            short s = 0;
            short s0 = (short) (b[0] & 0xff);// 最低位
            short s1 = (short) (b[1] & 0xff);
            s1 <<= 8;
            s = (short) (s0 | s1);
            return s;
        }

        /**
         * @方法功能 整型与字节数组的转换
         * @param 整型
         * @return 四位的字节数组
         */
        public static byte[] intToByte(int i) {
            byte[] bt = new byte[4];
            bt[0] = (byte) (0xff & i);
            bt[1] = (byte) ((0xff00 & i) >> 8);
            bt[2] = (byte) ((0xff0000 & i) >> 16);
            bt[3] = (byte) ((0xff000000 & i) >> 24);
            return bt;
        }

        /**
         * @方法功能 字节数组和整型的转换
         * @param 字节数组
         * @return 整型
         * @author www.zuidaima.com
         */
        public static int bytesToInt(byte[] bytes) {
            int num = bytes[0] & 0xFF;
            num |= ((bytes[1] << 8) & 0xFF00);
            num |= ((bytes[2] << 16) & 0xFF0000);
            num |= ((bytes[3] << 24) & 0xFF000000);
            return num;
        }

        /**
         * @方法功能 字节数组和长整型的转换
         * @param 字节数组
         * @return 长整型
         */
        public static byte[] longToByte(long number) {
            long temp = number;
            byte[] b = new byte[8];
            for (int i = 0; i < b.length; i++) {
                b[i] = new Long(temp & 0xff).byteValue();
                // 将最低位保存在最低位
                temp = temp >> 8;
                // 向右移8位
            }
            return b;
        }

        /**
         * @方法功能 字节数组和长整型的转换
         * @param 字节数组
         * @return 长整型
         */
        public static long byteToLong(byte[] b) {
            long s = 0;
            long s0 = b[0] & 0xff;// 最低位
            long s1 = b[1] & 0xff;
            long s2 = b[2] & 0xff;
            long s3 = b[3] & 0xff;
            long s4 = b[4] & 0xff;// 最低位
            long s5 = b[5] & 0xff;
            long s6 = b[6] & 0xff;
            long s7 = b[7] & 0xff; // s0不变
            s1 <<= 8;
            s2 <<= 16;
            s3 <<= 24;
            s4 <<= 8 * 4;
            s5 <<= 8 * 5;
            s6 <<= 8 * 6;
            s7 <<= 8 * 7;
            s = s0 | s1 | s2 | s3 | s4 | s5 | s6 | s7;
            return s;
        }
    }
